Portable tool box



FIG. 1 is a front side view of the tool box at first position;

FIG. 2 is a left side view of the tool box seen in FIG. 1 at first position; right side view being a mirror image thereof;

FIG. 3 is a front left and top perspective view of the tool box at second position;

FIG. 4 is a left side view of the tool box seen in FIG. 1 at second position; right side view being a mirror image thereof;

FIG. 5 is a rear right and top perspective view of the tool box seen in FIG. 1 at third position;

FIG. 6 is a front left and top perspective view of the tool box at fourth position; and,

FIG. 7 is a right side view of the tool box seen in FIG. 1 at fourth position; left side view being a mirror image thereof.

Broken lines in the drawing figures are used to show portions of the tool box that are not being claimed and thus form no part of the claimed design. 

The ornamental design for a portable tool box, as shown and described. 